Hi there. First, thank you for these games (SL and TFTUV). I love them, and they're very well done (technically as well as artistically).
Regarding Renar86's issue, I've had the same problem, and it took me a bit to figure it out.
The dialog choices are actually there, but the dialog font and the background behind are really of almost the same colour, rendering the dialog choices almost invisible. I had to play with my phone's luminosity and tilting it to a certain angle to distinguish the dialog choices.
Hope that can help.